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WO2016125403A1 - Verre à vitre pour véhicule - Google Patents

Verre à vitre pour véhicule Download PDF

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Publication number
WO2016125403A1
WO2016125403A1 PCT/JP2015/085170 JP2015085170W WO2016125403A1 WO 2016125403 A1 WO2016125403 A1 WO 2016125403A1 JP 2015085170 W JP2015085170 W JP 2015085170W WO 2016125403 A1 WO2016125403 A1 WO 2016125403A1
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WO
WIPO (PCT)
Prior art keywords
glass plate
power feeding
window glass
glass
wire
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2015/085170
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English (en)
Japanese (ja)
Inventor
広道 山下
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Sheet Glass Co Ltd
Original Assignee
Nippon Sheet Glass Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Sheet Glass Co Ltd filed Critical Nippon Sheet Glass Co Ltd
Publication of WO2016125403A1 publication Critical patent/WO2016125403A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J1/00—Windows; Windscreens; Accessories therefor
    • B60J1/20—Accessories, e.g. wind deflectors, blinds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/84—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields

Definitions

  • the present invention relates to a window glass for a vehicle.
  • a conductive wire portion On the surface of a window glass for a vehicle attached to an automobile or the like, there is a conductive wire portion provided with a heat wire portion for removing condensation or melting ice and a power feed portion for supplying power to the heat wire portion. May be provided.
  • the conductive line portion is formed by printing and baking a conductive paste such as silver on the surface of the window glass.
  • the heating wire provided on each of the lower end side and the side end side of the glass plate, and the lower end of the glass plate,
  • a windshield including a conductor pattern having a power supply electrode for supplying power to a heating wire.
  • a heating wire is arranged in a region where a wiper is operated to push out water droplets, ice, snow, frost and the like. And the heat etc. of the heat generating filament can melt the ice adhering to this area
  • the hot wire part is separated from the edge of the glass plate, that is, the region where the large temperature difference occurs is not too close to the edge of the glass plate, Reduction of the thermal stress which acts on the edge part of a glass plate is performed.
  • the inventor of the present invention has found that the following problems may occur by separating the hot wire portion from the end portion of the glass plate. That is, if the hot wire portion is separated too far from the end portion of the glass plate, the length of the power feeding portion extending from the end portion of the glass plate is increased in order to feed power to the hot wire portion.
  • the power feeding portion since the current flowing through the hot wire portion also flows through the power feeding portion, the power feeding portion also generates heat.
  • the length of the power feeding unit is increased, the region heated by the power feeding unit is widened.
  • the inventor of the present invention has found that the thermal stress acting on the vicinity of the end portion of the glass plate provided with the power feeding portion increases due to this influence.
  • the present invention has been made in view of such circumstances, and the purpose thereof is to increase the thermal stress in the vicinity of the end portion of the glass plate even if the heat ray portion is separated from the end portion of the glass plate. It is to provide technology to suppress.
  • the present invention adopts the following configuration in order to solve the above-described problems.
  • the window glass according to one aspect of the present invention is a window glass for a vehicle that is formed of a glass plate and a conductive material and includes a conductive line portion disposed on any surface of the glass plate.
  • the conductive line portion is disposed away from the end portion of the glass plate, and has a heat line portion having a predetermined pattern so as to heat a predetermined region of the glass plate, and from the vicinity of the end portion of the glass plate.
  • a power supply unit that extends and is connected to the heat line unit and supplies power to the heat line unit.
  • the power feeding unit is partially thinned.
  • the power feeding unit is partially thinned. That is, the power supply part has a partially narrowed line width.
  • the resistance value at that portion increases, so that generally the amount of heat generated at the portion where the line width is narrowed becomes large.
  • region which heats a glass plate becomes narrow, in other words, the area
  • the configuration even if the length of the power feeding unit is increased by separating the heat ray part from the end of the glass plate, the amount of heat generated in the entire power feeding unit can be suppressed. An increase in thermal stress in the vicinity of the end can be suppressed.
  • the predetermined pattern of the heat ray portion can be appropriately determined according to the embodiment.
  • money, platinum etc. may be sufficient as an electroconductive material, for example, and if the said use of an electroconductive wire
  • the vicinity of the end of the glass plate may be in a state of being in contact with the end of the glass plate, or in a state of being separated from the end of the glass plate to such an extent that wiring from the power source of the vehicle can be connected. There may be.
  • the region near the end of the glass plate includes a region where the thermal stress generated at the end of the glass plate can increase due to heat generated by the power feeding unit.
  • the power feeding portion includes a base portion disposed near an end portion of the glass plate, a thin wire portion having a line width narrower than the base portion and extending from the base portion, You may have.
  • the electric power feeding part becomes thin at the front end side, and can suppress the quantity of the heat
  • a plurality of the thin wire portions may be provided, the plurality of thin wire portions may be separated from each other, and the heat ray portion may be any of the plurality of thin wire portions.
  • You may be comprised so that it may be electrically fed by connecting to. According to the said structure, the connection with the heat ray part of various aspects becomes easy, and the freedom degree of design of an electroconductive wire
  • the heat ray portion may be divided and connected to each of the plurality of thin wire portions.
  • the hot wire part is a region having a high calorific value.
  • this heat ray part is divided
  • the connecting portion between the heat wire portion and each thin wire portion can be separated. That is, since the region where the heat generation amount is high can be separated, according to the configuration, the amount of heat generated in the vicinity of the power feeding unit can be suppressed, thereby increasing the thermal stress in the vicinity of the end of the glass plate. Can be suppressed.
  • a distance separating the plurality of thin wire portions from each other may be longer than a line width of each of the plurality of thin wire portions.
  • line parts is comprised longer than the line width of each thin wire
  • the base portion of the power feeding unit may be disposed in contact with the end of the glass plate.
  • the base part of the power feeding unit is a part having a large line width, and is connected to a wiring from the power source of the vehicle. According to the said structure, since this base is arrange
  • the conductive material may include silver.
  • Silver has high conductivity, is relatively easily available, and is inexpensive. Therefore, according to the said structure, a good quality conductive filament part can be formed at low cost.
  • the window glass may be used as a windshield of an automobile.
  • Glass plates used for automotive windshields are generally not tempered. When the glass plate is not strengthened, the glass plate is relatively easily cracked by the thermal stress generated at the end of the glass plate.
  • the raise of the thermal stress in the edge part vicinity of a glass plate can be suppressed. Therefore, even if the glass plate is not tempered, the possibility of cracking can be reduced.
  • the term “strengthening” refers to, for example, heating the glass plate to about 700 ° C. and then rapidly cooling the glass plate to provide a compression layer on the surface of the glass plate, thereby increasing the strength of the glass plate to about 3 to 5 times. Is to increase.
  • an increase in thermal stress in the vicinity of the end portion of the glass plate can be suppressed even if the hot wire portion is separated from the end portion of the glass plate.
  • FIG. 1 is a plan view schematically illustrating a window glass according to the embodiment.
  • FIG. 2 is a partial enlarged view schematically illustrating the power feeding unit according to the embodiment.
  • FIG. 3 schematically illustrates a window glass manufacturing process according to the embodiment.
  • FIG. 4 is a partially enlarged view schematically illustrating a power feeding unit according to another embodiment.
  • FIG. 5 is a partial enlarged view schematically illustrating a power feeding unit according to another embodiment.
  • FIG. 6 is a plan view schematically illustrating a heat ray portion according to another embodiment.
  • FIG. 7 shows a temperature distribution in the vicinity of the power feeding part when the hot wire part of the window glass according to the reference example is heated.
  • FIG. 1 is a plan view schematically illustrating a window glass according to the embodiment.
  • FIG. 2 is a partial enlarged view schematically illustrating the power feeding unit according to the embodiment.
  • FIG. 3 schematically illustrates a window glass manufacturing process according to the embodiment.
  • FIG. 4 is a
  • FIG. 8 shows a thermal stress distribution in the vicinity of the power feeding part when the hot wire part of the window glass according to the reference example is heated.
  • FIG. 9 shows a temperature distribution in the vicinity of the power feeding part when the hot wire part of the window glass according to the comparative example is heated.
  • FIG. 10 shows a thermal stress distribution in the vicinity of the power feeding portion when the hot wire portion of the window glass according to the comparative example is heated.
  • FIG. 11 shows a temperature distribution in the vicinity of the power feeding part when the hot wire part of the window glass according to the example is heated.
  • FIG. 12 shows a thermal stress distribution in the vicinity of the power feeding portion when the hot wire portion of the window glass according to the example is heated.
  • this embodiment will be described with reference to the drawings.
  • this embodiment described below is only an illustration of the present invention in all respects. It goes without saying that various improvements and modifications can be made without departing from the scope of the present invention. That is, in implementing the present invention, a specific configuration according to the embodiment may be adopted as appropriate.
  • FIG. 1 is a plan view schematically illustrating a window glass 1 according to this embodiment.
  • the up and down direction in FIG. 1 is referred to as “up and down”, and the left and right direction in FIG. 1 is referred to as “left and right”.
  • FIG. 1 illustrates a window glass 1 viewed from the inside of the vehicle. That is, the back side of the sheet of FIG. 1 is the outside of the vehicle, and the front side of the sheet of FIG. 1 is the inside of the vehicle.
  • the window glass 1 is a window glass for a vehicle that is attached to an automobile, and is specifically a windshield of an automobile.
  • the window glass 1 includes a glass plate 10 having a substantially rectangular shape, and is attached to an automobile with a slight inclination from the vertical.
  • the glass plate 10 includes an upper end 11 extending in the left-right direction, a lower end 12 facing the upper end 11 and slightly curved, a right end 13 connecting the right ends of the upper end 11 and the lower end 12, and an upper end.
  • left end 14 connecting the left ends of portion 11 and lower end 12.
  • a shielding layer 3 that shields the field of view from the outside of the vehicle is provided along the periphery of the glass plate 10.
  • the conductive line portion 2 having a predetermined pattern is formed from the lower end portion 12 to the left end portion 14.
  • the glass plate 10 which concerns on this embodiment is utilized as a window glass of a motor vehicle, and is comprised by the shape according to the window frame of the motor vehicle attached.
  • the glass plate 10 has a substantially rectangular shape in plan view, and in side view, the inner surface is concave and the outer surface is convex from the periphery to the center. It is formed in a curved shape.
  • Such a glass plate 10 can have various configurations depending on the embodiment.
  • the glass plate 10 a known glass plate for automobiles can be used.
  • the glass plate 10 may be heat ray absorbing glass, general clear glass or green glass, or UV green glass.
  • the solar radiation absorptivity and visible light transmittance can be adjusted to satisfy safety standards.
  • an example of a composition of clear glass and an example of a heat ray absorption glass composition are shown.
  • the composition of the heat-absorbing glass for example, based on the composition of the clear glass, the proportion of the total iron oxide in terms of Fe 2 O 3 (T-Fe 2 O 3) and 0.4 to 1.3 wt%, CeO
  • the ratio of 2 is 0 to 2% by mass
  • the ratio of TiO 2 is 0 to 0.5% by mass
  • the glass skeleton components (mainly SiO 2 and Al 2 O 3 ) are T—Fe 2 O 3 , CeO.
  • the composition can be reduced by an increase of 2 and TiO 2 .
  • the kind of glass plate 10 is not restricted to clear glass, heat ray absorption glass, etc., According to embodiment, it can select suitably.
  • the glass plate 10 may be an acrylic or polycarbonate resin window.
  • the thickness of the glass plate 10 according to the present embodiment may not be particularly limited. However, from the viewpoint of weight reduction, the thickness of the glass plate 10 may be set in the range of 2.2 to 5.1 mm, or may be set in the range of 2.4 to 3.8 mm. It may be set in the range of 7 to 3.2 mm. Furthermore, the thickness of the glass plate 10 may be set to be 3.1 mm or less.
  • the shielding layer 3 As illustrated in FIG. 1, in the present embodiment, the shielding layer 3 is formed on the peripheral edge portion of the inner surface of the glass plate 10. The shielding layer 3 is provided so that the attachment portion of the glass plate 10 and the like cannot be seen from outside the vehicle. Therefore, the region where the shielding layer 3 is provided can be appropriately selected and set according to the embodiment.
  • the material of the shielding layer 3 may be appropriately selected according to the embodiment, and a dark ceramic such as black, brown, gray, or dark blue may be used.
  • a black ceramic is laminated on the inner surface of the glass plate 10 by screen printing or the like, and the laminated ceramic together with the glass plate 10 is heated.
  • the shielding layer 3 having a single layer structure can be formed on the peripheral edge of the window glass 1.
  • various materials can be used for the ceramic used for the shielding layer 3.
  • a ceramic having the following composition can be used for the shielding layer 3.
  • the thickness of the shielding layer 3 can be set as appropriate.
  • the thickness of the shielding layer 3 can be set in the range of 10 ⁇ m to 20 ⁇ m.
  • the shielding layer 3 can prevent deterioration of the adhesive for attaching the glass plate 10 to the vehicle body by cutting ultraviolet rays.
  • FIG. 2 is a partially enlarged view illustrating the power feeding portions 23 to 25 of the conductive wire portion 2.
  • the conductive linear portion 2 according to the present embodiment is disposed on the inner surface of the glass plate 10 via the shielding layer 3.
  • line part 2 is electrically fed to two hot wire parts (21, 22) which have a predetermined pattern, and each hot wire part (21, 22) so that the predetermined area
  • the hot wire portion 21 is disposed away from the lower end portion 12 and is provided along the lower end portion 12 from the slightly right side of the center of the glass plate 10 to the vicinity of the right end portion 13. Further, the heat ray portion 22 is arranged away from the lower end portion 12 and extends along the lower end portion 12 from the slightly right side of the center of the glass plate 10 to the vicinity of the left end portion 14, and then from the vicinity of the lower end portion 12 to the upper end portion. 11 extends to the vicinity of 11 along the left end 14.
  • the region where each heat ray portion (21, 22) is provided corresponds to a standby position and a reverse position of a wiper (not shown). Such a pattern of each heat ray part (21, 22) can be appropriately changed according to the embodiment.
  • the power supply portions 23 to 25 extend upward from the lower end portion 12 of the glass plate 10 and are connected to the heat wire portions (21, 22).
  • the power feeding units 23 and 25 are positive electrodes, and the power feeding unit 24 is a negative electrode. Therefore, the power supply unit 23 is connected to the heat wire unit 21, and the power supply unit 25 is connected to the heat wire unit 22. Moreover, the electric power feeding part 24 is connected with both hot-wire parts (21, 22).
  • a harness 4 having three terminal portions is attached to each of the power supply units 23 to 25 by soldering or the like, and wiring (not shown) from the power source of the automobile is connected to each of the power supply units 23 to 25 via this harness. The Therefore, the driver of the automobile can supply electricity to the conductive wire portion 2 by operating an operation panel (not shown).
  • each heat ray part (21, 22) When electricity is supplied to the conductive wire portion 2, a current is generated in each heat wire portion (21, 22) via each power supply portion 23-25. If it does so, each heat ray part (21, 22) will be heated by the energy of the electricity which flows, and the glass plate 10 will be warmed in the area
  • each heat ray part (21, 22) is provided apart from the lower end part 12 of the glass plate 10 where the power feeding parts 23 to 25 are arranged. For this reason, when the heat ray portions (21, 22) are too far away from the lower end portion 12, the lengths of the power feeding portions 23 to 25 become long. Then, as described above, the thermal stress in the vicinity of the end portions of the respective power feeding portions 23 to 25, that is, in the vicinity of the region where the power feeding portions 23 to 25 are provided in the lower end portion 12 of the glass plate 10, is increased. This may cause cracks.
  • the heat generation amount of each of the power supply units 23 to 25 is suppressed by subdividing each of the power supply units 23 to 25. This suppresses an increase in thermal stress in the vicinity of this region and reduces the possibility of cracking.
  • each configuration will be described in detail.
  • the power feeding parts 23 to 25 are arranged near the lower end part 12 of the glass plate 10 and extend inward in the surface direction to be connected to the heat ray parts (21, 22).
  • Each of the power feeding units 23 to 25 is partially thinned.
  • the power supply unit 23 includes a rectangular base 230 having a wide and rectangular shape that is disposed near the lower end 12 of the glass plate 10, and extends upward from the base 230 and has a narrower line width than the base 230. And a thin wire portion 231.
  • the power supply unit 24 includes a base portion 240 similar to the base portion 230 and four thin wire portions 241 to 244 each extending upward from the end portion of the base portion 240 and having a line width narrower than that of the base portion 240.
  • Each of the thin line portions 241 to 244 is formed in a rectangular shape and is spaced apart from each other in the left-right direction.
  • the thin line portion 244 is configured to have a wider line width than the other thin line portions 241 to 243, bends to the right near the base portion 240, and then extends upward.
  • the fine wire portion 243 is connected to the bent portion of the fine wire portion 244.
  • the thin line portion may branch in the middle of extension.
  • the power supply unit 25 includes a base portion 250 similar to the base portion 230 and the base portion 240, and three thin wire portions 251 to 253 that extend upward from the end portions of the base portion 250 and have a line width narrower than that of the base portion 250. ing.
  • Each of the thin line portions 251 to 253 is formed in a rectangular shape and is spaced apart from each other in the left-right direction.
  • the thin line portion 251 is configured to have a larger line width than the other thin line portions (252, 253).
  • each terminal part of the harness 4 is attached to each base part (230, 240, 250) of each power supply part 23-25. Therefore, each base (230, 240, 250) is configured to have a certain line width so as to withstand a large current from the power source of the automobile.
  • each base part (230, 240, 250) of each of the power feeding parts 23 to 25 is set in a range of 10 mm to 20 mm.
  • the width of each base part (230, 240, 250) may not be limited to such a range, and can be appropriately selected according to the embodiment.
  • each base part (230, 240, 250) is arrange
  • each base (230, 240, 250) may be slightly separated from the end of the glass plate 10 as long as the harness 4 can be bonded. That is, the vicinity of the end portion of the glass plate 10 may be in a state of being in contact with the end portion of the glass plate 10, and the glass plate 10 may be connected to a wiring (harness 4) from a vehicle power source. The state separated from the edge part may be sufficient.
  • the region in the vicinity of the end portion of the glass plate 10 includes a region where the thermal stress generated at the end portion of the glass plate 10 can be increased by the heat generation of each of the power feeding units 23 to 25.
  • the thin line portions (231, 241 to 244, 251 to 253) are not required as the respective base portions (230, 240, 250), and therefore the line width can be reduced.
  • the resistance value increases as the line width is reduced, the amount of heat generation generally increases.
  • the region that cannot be heated by each of the power supply units 23 to 25 is widened, the region that radiates the generated heat is widened.
  • by making the line width of each thin line portion (231, 241 to 244, 251 to 253) of each power feeding portion 23 to 25 narrow it is possible to make use of the fact that such a heat dissipation region is widened. The amount of heat generated by the power feeding units 23 to 25 is reduced.
  • the fine wire units (231, 241 to 244, 251 to 253) The width is preferably set in the range of 1 mm to 10 mm. Furthermore, it is more preferable that the width of each thin line portion (231, 241 to 244, 251 to 253) is set to 5 mm or less. However, the width of each thin line portion (231, 241 to 244, 251 to 253) is not limited to such a range, and can be appropriately selected according to the embodiment.
  • the distances at which the thin wire portions (231, 241 to 244, 251 to 253) are separated from each other, that is, the distance between the adjacent thin wire portions may be longer than the line width of each thin wire portion.
  • the width of the region between adjacent thin line portions is configured to be longer than the line width of each thin line portion (231, 241 to 244, 251 to 253). Therefore, it is possible to sufficiently secure the size of the region between adjacent thin wire portions, and the heat generated in each thin wire portion (231, 241 to 244, 251 to 253) can be sufficiently dissipated by this region. . Accordingly, it is possible to suppress an increase in the temperature of the entire power feeding units 23 to 25, thereby sufficiently suppressing an increase in thermal stress in the vicinity of the region where the power feeding units 23 to 25 are provided at the lower end portion 12 of the glass plate 10. Can do.
  • each heat ray part (21, 22) is demonstrated.
  • the heat ray part 21 is comprised by two elongate filaments (211 and 212).
  • Each of the filaments (211 and 212) extends along the lower end portion 12 from the vicinity of the upper end of the thin wire portion 231 of the power supply portion 23 toward the right end portion 13 and then turns back once near the right end portion 13 toward the power supply portion 23. Come back.
  • Each of the filaments (211 and 212) is further folded back in the vicinity of the upper portion of the power supply unit 23 and extends along the lower end portion 12 toward the right end portion 13 again.
  • Each of the filaments (211, 212) is folded back again near the right end portion 13, returned toward the power feeding unit 24, and connected to the upper end of the thin wire portion 244 of the power feeding unit 24.
  • the hot wire portion 22 is composed of five elongated strips 221 to 225.
  • the three filaments 221 to 223 extend from the vicinity of the upper ends of the thin wire portions 251 to 253 of the power supply portion 25 toward the left end portion 14 along the lower end portion 12 and are folded back in the vicinity of the left end portion 14. Then, the power supply unit 24 returns to the vicinity of the upper ends of the thin wire portions 241 to 243 of the power supply unit 24.
  • the two filaments (224, 225) located on the outside are connected to the lower side of the narrow wire portion 251 of the power feeding unit 25 from the position where the wire strip 221 is connected, and toward the left end 14. It extends along the lower end 12.
  • Each of the filaments (224, 225) is bent near the left end 14 and extends toward the upper end 11 along the left end 14. Then, each of the filaments (224, 225) is folded back near the upper end portion 11, returned again to the vicinity of the lower end portion 12, and further bent near the lower end portion 12 to return toward the power feeding portion 24. It is connected near the upper end of 244.
  • the line width of each filament (211, 212, 221 to 225) of each hot wire portion (21, 22) is 0.5 mm to It is preferable to set in the range of 10 mm. Further, it is more preferable that the line width of each filament (211, 212, 221 to 225) of each hot wire part (21, 22) is set to 3 mm or less. However, the line width of each filament (211, 212, 221 to 225) of each hot wire part (21, 22) does not have to be limited to these ranges, and can be appropriately selected according to the embodiment.
  • the conductive wire portion 2 is constituted by the heat wire portions (21, 22) and the power feeding portions 23 to 25.
  • a conductive filament part 2 is formed by laminating
  • the material of the conductive filament part 2 should just have electroconductivity, and can be suitably selected for embodiment.
  • the material of the conductive filament part 2 silver, gold, platinum, etc. can be mentioned.
  • the conductive line portion 2 can be formed by printing and baking a conductive silver paste containing silver powder, glass frit and the like on the shielding layer 3. Silver is highly conductive, relatively easily available, and inexpensive. Therefore, in order to form the conductive line portion 2 with good quality at low cost, the conductive material preferably contains silver.
  • FIG. 3 schematically illustrates a shaping process of the glass plate 10 according to the present embodiment.
  • the manufacturing process of the window glass 1 demonstrated below is only an example, and each manufacturing process may be changed as much as possible. Further, in the manufacturing process described below, steps can be omitted, replaced, and added as appropriate according to the embodiment.
  • a heating furnace 901 and a molding device 902 are arranged in this order from upstream to downstream.
  • the roller conveyor 903 is arrange
  • the glass plate 10 used as a process target is conveyed by this roller conveyor 903.
  • the glass plate 10 is formed in a flat plate shape before being carried into the heating furnace 901. And a black ceramic is laminated
  • the heating furnace 901 can have various configurations, but can be an electric heating furnace, for example.
  • the heating furnace 901 includes a rectangular tube-shaped furnace main body whose upstream and downstream ends are open, and a roller conveyor 903 is disposed in the interior from upstream to downstream.
  • Heaters (not shown) are disposed on the upper surface, the lower surface, and the pair of side surfaces of the inner wall surface of the furnace body, respectively, and the temperature at which the glass plate 10 passing through the heating furnace 901 can be formed, for example, the softening point of glass. Heat to near.
  • the heating furnace 901 heats the glass plate 10 at about 650 ° C. As a result, the glass plate 10 can be molded, and the silver paste is baked to form the conductive line portion 2.
  • the forming apparatus 902 is configured to press a glass plate with an upper die 921 and a lower die 922 to form a predetermined shape.
  • the upper die 921 has a downwardly convex curved shape that covers the entire upper surface of the glass plate 10 and is configured to be movable up and down.
  • the lower mold 922 is formed in a frame shape corresponding to the peripheral edge of the glass plate 10, and the upper surface thereof has a curved shape so as to correspond to the upper mold 921. With this configuration, the glass plate 10 is press-formed between the upper die 921 and the lower die 922, and formed into a final curved shape.
  • a roller conveyor 903 is disposed in the frame of the lower mold 922, and the roller conveyor 903 can move up and down so as to pass through the frame of the lower mold 922. And although illustration is abbreviate
  • each of the power feeding units 23 to 25 is thinned. Specifically, each of the power feeding units 23 to 25 has a thin line width on the tip side by the thin line portions (231, 241 to 244, 251 to 253). As the line width becomes narrower, the resistance value at that portion increases, so that generally the amount of heat generated at each thin line portion (231, 241 to 244, 251 to 253) increases. On the other hand, a gap is provided between the thin wire portions (231, 241 to 244, 251 to 253), that is, the region heated by each of the power feeding portions 23 to 25 becomes narrow, and the region for radiating the generated heat is wide. Become.
  • a plurality of thin line portions (231, 241 to 244, 251 to 253) are provided. Therefore, it becomes possible to variously connect the filaments (211, 212, 221 to 225) and the thin wire sections (231, 241 to 244, 251 to 253) of each heat ray part (21, 22), and conductive wires
  • the degree of freedom in designing the strip 2 can be increased.
  • the filaments (211, 212, 221 to 225) of the respective hot wire sections (21, 22) are divided into a plurality of thin wire sections (231, 241 to 244, 251 to 253) and connected.
  • each heat wire portion (21, 22) is a region having a high calorific value, and in particular, each wire (211, 212, 221 to 225) and each thin wire portion (231, 241 to 225). 244, 251 to 253), the amount of heat generation becomes large.
  • each of the filaments (211, 212, 221 to 225) and each of the thin wire portions (231, 251) are separated.
  • 241 to 244 and 251 to 253) can be separated from each other.
  • a region with a high calorific value can be separated, and according to the present embodiment, the amount of heat generated around each of the power feeding units 23 to 25 can be suppressed.
  • An increase in thermal stress in the vicinity of (lower end portion 12) can be suppressed.
  • the window glass 1 is a windshield for motor vehicles.
  • the window glass to which the present invention can be applied is not limited to the windshield of an automobile, and can be appropriately selected according to the embodiment.
  • glass plates used for automobile windshields are not generally reinforced. When the glass plate is not strengthened, the glass plate is relatively easily cracked by the thermal stress generated at the end of the glass plate.
  • stressening refers to, for example, heating the glass plate to about 700 ° C. and then rapidly cooling the glass plate to provide a compression layer on the surface of the glass plate, thereby increasing the strength of the glass plate to about 3 to 5 times. Is to increase.
  • the glass plate 10 has a shape curved forward, but may be a flat shape.
  • the glass plate 10 is formed in a substantially rectangular shape.
  • the shape of the glass plate 10 is not limited to the above embodiment, and can be appropriately selected according to the embodiment.
  • the glass plate 10 is composed of a single glass plate.
  • the glass plate 10 may be made of laminated glass in which an outer glass plate and an inner glass plate are bonded to each other through an intermediate film.
  • the conductive line portion 2 may be laminated on the inner surface of the outer glass plate. Accordingly, a notch may be provided in a part of a region corresponding to the power feeding portions 23 to 25 of the inner glass plate so that the harness 4 can be attached to the power feeding portions 23 to 25. .
  • each power supply is separated from the end portion of the outer glass plate inward in the plane direction. Providing the portions 23 to 25 can be avoided. In other words, each of the power feeding units 23 to 25 is provided in the vicinity of the end of the outer glass plate, in particular, in contact with or near the end of the outer glass plate.
  • the shielding layer 3 is provided so that the peripheral part of the window glass 1 may be followed.
  • the region where the shielding layer 3 is provided can be set as appropriate according to the embodiment.
  • the shielding layer 3 overlaps with the driver's visual field range, the driver's field of view is obstructed by the shielding layer 3 during driving. Therefore, it is preferable to set the region of the shielding layer 3 so as not to overlap the driver's visual field range.
  • the shielding layer 3 may be omitted. In this case, the conductive line portion 2 is directly laminated on the surface of the glass plate 10.
  • the shielding layer 3 has a single layer structure.
  • the shielding layer 3 can have a multilayer structure.
  • the first ceramic layer is formed by laminating ceramics on the inner surface of the glass plate 10.
  • a silver layer is formed by laminating silver on the first ceramic layer.
  • a second ceramic layer is formed by laminating a ceramic on the silver layer.
  • the three-layer shielding layer 3 can shield electromagnetic waves by a silver layer.
  • the material of the composition shown in the following Table 2 can be utilized for this silver layer.
  • the shielding layer 3 is laminated on the inner surface of the glass plate 10.
  • the surface on which the shielding layer 3 is laminated may not be limited to the vehicle inner surface, but may be the vehicle outer surface.
  • stacks the shielding layer 3 may be suitably selected from the surface of a several glass plate.
  • the adhesiveness when attaching the window glass 1 to an automobile can be improved by laminating ceramics on the inner surface of the glass plate 10. Moreover, it can prevent that the window glass 1 becomes easy to be broken in an attachment part by this shielding layer 3 becoming a cushion between the glass plate 10 and the attachment part of a motor vehicle.
  • the components may be appropriately omitted, changed, replaced, and added according to the embodiment.
  • the arrangement of the hot wire part, the number of the filaments constituting the hot wire part, the arrangement of each filament, the shape of each filament, the number of fine wire parts, the number of power feeding parts, etc. may be appropriately selected according to the embodiment. .
  • each heat ray part (21, 22) should just be formed so that it may have a predetermined pattern so that the predetermined area
  • the region to be set can be appropriately selected according to the embodiment.
  • the conductive line portion 2 may be formed on the surface of the glass plate 10 on the vehicle outer side.
  • FIG. 4 illustrates a conductive filament portion 5 according to another embodiment.
  • the conductive wire portion 5 illustrated in FIG. 4 includes two heat wire portions (51, 52) and three power feeding portions 53 to 55.
  • the power feeding part 53 which is a positive electrode has a base part 530 and one thin line part 531 whose line width is narrower than the base part 530.
  • the power feeding unit 55 that is a positive electrode includes a base 550 and one thin line portion 551 having a line width narrower than that of the base 550.
  • the power feeding unit 54 that is a negative electrode has a base 540 and two thin wire portions (541, 542) each having a narrower line width than the base 540.
  • the three filaments 511 to 513 of the hot wire portion 51 extend from the vicinity of the upper end of the thin wire portion 531 of the power feeding portion 53, fold back, and return to the vicinity of the upper end of the thin wire portion 541 on the right side of the power feeding portion 54.
  • the two filaments (521, 522) arranged on the outer side extend from the middle of the narrow wire portion 551 of the power feeding portion 55 and are folded back. It returns to the vicinity of the upper end of the thin line portion 542 on the left side of the power feeding portion 54.
  • the two filaments (523, 524) arranged on the inner side are repeatedly folded in the same manner as the respective heat wire portions (211, 212), and finally the thin wire portion 542 on the left side of the power feeding unit 54. It is back near the top of
  • the number of filaments in such a hot wire part and the correspondence between the fine wire part and the hot wire part (strip) can be appropriately selected according to the embodiment. Further, the correspondence relationship between the positive electrode and the negative electrode of the power feeding unit may be reversed.
  • FIG. 5 illustrates a conductive line portion 6 according to another embodiment.
  • the conductive wire portion 6 illustrated in FIG. 5 includes one heat wire portion 61 and two power feeding portions (62, 63).
  • the power feeding unit 62 which is a positive electrode includes a base 620 and two thin wire portions (621, 622) whose line width is narrower than that of the base 620. Note that the fine line portion 622 arranged on the inner side has a larger line width than the fine line portion 621 arranged on the outer side.
  • the power feeding portion 63 that is a negative electrode includes a base portion 630 and two thin wire portions (631 and 632) having a line width narrower than that of the base portion 630.
  • the fine line portion 631 arranged on the inner side is thicker than the thin line portion 632 arranged on the outer side. The line width of such a thin line portion can be changed as appropriate.
  • the hot wire part 61 has five filaments 611 to 615.
  • the two filaments (611, 612) are connected to the fine wire portion 621 and the fine wire portion 632 having a narrower line width.
  • the three filaments 613 to 615 are connected to the fine line portion 622 and the fine line portion 631 having a larger line width.
  • the line width of the thin wire portion of the power feeding portion may be the same as the line width of the heat wire portion.
  • the thin wire portion of the power feeding portion may have a shape integrated with the filament of the heat wire portion.
  • the heat ray part 21 and the heat ray part 22 are extended from the lower end part 12 side of the glass plate 10.
  • FIG. Moreover, the heat ray part 21 and the heat ray part 22 are formed with the same material.
  • the arrangement and material of the heat ray portion may be appropriately selected according to the embodiment. For example, you may comprise a heat ray
  • FIG. 6 illustrates a window glass 1A provided with a heat ray portion 71 according to another embodiment.
  • the glass plate 10 is formed in a trapezoidal shape.
  • this window glass 1A is equipped with the heat ray part 71 and the two electric power feeding parts (72, 73) for supplying electricity to this heat ray part 71, and comprises what is called a wire-heated windshield.
  • the heat ray portion 71 connects the bus bar portion 711 extending along the upper end portion 11 and the left end portion 14, the bus bar portion 712 extending along the lower end portion 12, and the bus bar portions (711, 712).
  • the line 713 is provided.
  • each bus-bar part (711,712) may be formed with a copper film tape.
  • each filament 713 may be formed of a conductive metal wire or the like.
  • a tungsten wire can be used for each filament 713.
  • the material of each part of the heat ray part 71 can be suitably selected according to embodiment.
  • Each power feeding section (72, 73) has a base section (721, 731) disposed so as to be in contact with the lower end section 12 and a thin wire section (722, 732) extending from each base section (721, 731). is doing.
  • the thin wire portion 722 of the power supply portion 72 is connected to the bus bar portion 712 of the heat wire portion 71, and the thin wire portion 732 of the power supply portion 73 is connected to the bus bar portion 711 of the heat wire portion 71.
  • the wiring from the power supply from a motor vehicle is connected with each electric power feeding part (72, 73). Thereby, electricity can be supplied to the heat ray part 71 via each electric power feeding part (72, 73).
  • the bus bar portion may be handled as one region of the heat ray portion.
  • a bus-bar part may be handled as one area
  • each base (230, 240, 250) is disposed near the lower end 12 of the glass plate 10, and each thin line portion (231, 241 to 244, 251 to 253) is each base (230, 240). , 250) on the inner side of the glass plate 10 in the plane direction.
  • the positional relationship between each base portion and each thin line portion may not be limited to such an example, and may be set as appropriate according to the embodiment. That is, in each power feeding unit, the region to be thinned may be appropriately set according to the embodiment.
  • the molding apparatus 902 that press-molds the glass plate 10 has been described.
  • the method of forming the glass plate 10 of the window glass 1 is not limited to such an example, and may be formed by, for example, a self-weight bending method in which the glass plate 10 is bent by its own weight.
  • the molding apparatus has, for example, a ring-shaped (frame-shaped) mold.
  • the molding die is disposed on the transport table, and the flat glass plate 10 is placed on the molding die. In this state, the conveyance table sequentially passes through the heating furnace and the slow cooling furnace.
  • the glass plate 10 passes a heating furnace in the state in which only the peripheral part was supported. And if it heats to softening point temperature vicinity in a heating furnace, the inner side will curve below the peripheral part by dead weight, and the glass plate 10 will be shape
  • the window glass which has the structure substantially the same as the said embodiment except the shape of the electric power feeding part was assumed as the window glass which concerns on a reference example.
  • the three power feeding units are not subdivided and have a simple rectangular shape.
  • the glass plate in this reference example was a laminated glass in which an interlayer film of 0.76 mm was disposed between an outer glass plate having a thickness of 2.0 mm and an inner glass plate having a thickness of 1.8 mm.
  • the conductive material which forms a conductive filament part was made into the silver paste.
  • the pattern of the hot wire part is as shown in FIG. 1, the line width of each line (211, 212, 221 to 223) is 1.0 mm to 2.0 mm, and the line width of each line (224, 225) is 3 It was set to 0.0 mm to 7.0 mm.
  • the heating value in each wire is 2000 W / m 2
  • the total resistance value of the entire circuit is 1.16 ⁇ to 1.56 ⁇
  • the sheet resistance value of each hot wire portion is 5.0 m ⁇ / sqr to 7.0 m ⁇ / sqr. did.
  • the heat ray part shall be 40 mm away from the lower end part of the glass plate in the vicinity of the power supply part, and each power supply part was not provided with the base part and the fine wire part, and was assumed to be rectangular.
  • the length of each electric power feeding part was 50 mm, 80 mm, and 42 mm.
  • the width of each power feeding unit was set to 20 mm in common.
  • heat is generated in the conductive wire section under the conditions that the ambient temperature is 20 to 25 ° C., the energizing voltage is 12 V, and the energizing time is 25 minutes or more (when the current is stable).
  • the analysis software (Abaqus) capable of calculating the thermal stress in the glass plate, the temperature change and the thermal stress change generated in the window glass according to the reference example and the comparative example were simulated. The results are shown in FIGS.
  • FIG. 7 shows the temperature distribution (simulation result) in the vicinity of the feeding part of the window glass in the reference example.
  • FIG. 8 shows a thermal stress distribution (simulation result) in the vicinity of the feeding portion of the window glass according to the reference example.
  • FIG. 9 shows a temperature distribution (simulation result) in the vicinity of the feeding portion of the window glass in the comparative example.
  • FIG. 10 shows a thermal stress distribution (simulation result) in the vicinity of the feeding portion of the window glass according to the comparative example.
  • the thermal stress in the region where the power feeding unit is provided at the lower end of the glass plate (hereinafter also referred to as “the root of the power feeding unit”), that is, the portion indicated by the arrow P1 in FIG.
  • the thermal stress in the portion indicated by the arrow P2 in FIG. 10 is 18 MPa, and it was found that the thermal stress generated in this portion becomes very large when the power feeding portion is lengthened.
  • the region where the stress acts in the compression direction is also widened in correspondence with the wide range of the high temperature region. Therefore, by narrowing the high temperature region, that is, by lowering the temperature of the region where the power feeding unit is provided, the region where the stress acts in the compression direction is also narrowed, and the thermal stress acting on the root of the power feeding unit is also reduced. It was estimated. Accordingly, the present inventor has come up with the present invention in which the front end side of the power feeding portion is partially narrowed.
  • the window glass which has the same electric power feeding part as the said embodiment was assumed as the window glass which concerns on an Example.
  • the width of each base was 20 mm and the length was 20 mm.
  • line part 231 was 65 mm, and the line width was 8 mm.
  • the lengths of the thin wire portions corresponding to the thin wire portions 241 to 243 were 56 mm, 62 mm, and 55 mm, respectively, and the line width was 3 mm in common.
  • the length of the fine wire portion corresponding to the fine wire portion 244 was 70 mm, and the line width was 8 mm.
  • the length of the fine wire portion corresponding to the fine wire portion 251 was 40 mm, and the line width was 8 mm.
  • the lengths of the thin wire portions corresponding to the thin wire portions (252 and 253) were 46 mm and 51 mm, respectively, and the line width was 3 mm in common.
  • the other conditions of the window glass which concerns on an Example were made the same as a comparative example. That is, the arrangement of the heat ray portions in the examples was the same as that in the comparative example.
  • FIGS. 11 shows a temperature distribution (simulation result) in the vicinity of the feeding portion of the window glass in the example.
  • Z11 shows the thermal stress distribution (simulation result) near the electric power feeding part of the window glass in an Example.
  • the temperature of the region where the power feeding unit is provided is slightly lower than in the comparative example. Accordingly, the region where the stress acts in the compression direction indicated by the arrow C3 is also narrowed, and the thermal stress acting on the portion indicated by the arrow P3 is also reduced to 14.5 MPa. Therefore, it was shown that the thermal stress acting on the base of the power feeding part can be sufficiently reduced by subdividing the power feeding part.
  • Base 722 ... Fine wire part, 73 ... Power feeding part, 731 ... Base part, 732 ... Narrow wire part, 901 ... Heating furnace, 902 ... Molding device, 921 ... Upper mold, 922 ... Lower mold, 903 ... Roller conveyor, 931 ... Roller

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Surface Heating Bodies (AREA)
  • Resistance Heating (AREA)

Abstract

La présente invention concerne un verre à vitre pour un véhicule dans lequel est supprimée l'augmentation de la contrainte thermique dans le voisinage d'une extrémité d'une plaque de verre y compris si une partie fil chauffant est séparée de l'extrémité de la plaque de verre. Le verre à vitre selon un aspect de la présente invention est équipé d'une partie striée conductrice qui est constituée d'une plaque de verre et d'un matériau conducteur et disposée sur une surface quelconque de la plaque de verre. La partie striée conductrice est équipée : d'une partie fil chauffant qui est disposée de manière espacée d'une extrémité de la plaque de verre et qui présente un motif prédéfini de façon à chauffer une région prédéfinie de la plaque de verre ; et d'une unité d'alimentation en énergie qui s'étend depuis le voisinage de l'extrémité de la plaque de verre et qui est couplée à la partie fil chauffant de sorte à alimenter en énergie la partie fil chauffant. L'unité d'alimentation en énergie est partiellement atténuée.
PCT/JP2015/085170 2015-02-04 2015-12-16 Verre à vitre pour véhicule Ceased WO2016125403A1 (fr)

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JP2015-019982 2015-02-04
JP2015019982A JP6639089B2 (ja) 2015-02-04 2015-02-04 車両用の窓ガラス

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US10723318B2 (en) 2016-12-20 2020-07-28 AGC Inc. Window glass for a vehicle

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JP6769764B2 (ja) 2016-07-19 2020-10-14 株式会社ミツトヨ 測定プローブ及び測定装置
CN112236340A (zh) * 2018-06-12 2021-01-15 日本板硝子株式会社 挡风玻璃
CN118265678A (zh) 2021-12-17 2024-06-28 日本电气硝子株式会社 玻璃物品以及其制造方法

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WO1994005524A1 (fr) * 1992-09-03 1994-03-17 Ristance Corporation Vitre antigivre et antibrouillard, et procede pour sa fabrication
JPH101027A (ja) * 1996-06-12 1998-01-06 Central Glass Co Ltd 車両用の前部窓ガラス
JP2000235889A (ja) * 1998-11-10 2000-08-29 Asahi Glass Co Ltd 防曇ガラス
JP2002002452A (ja) * 2000-06-19 2002-01-09 Central Glass Co Ltd 防曇ガラスの加熱構造
WO2005105691A1 (fr) * 2004-04-28 2005-11-10 Asahi Glass Company, Limited Vitrage avec impression conductrice et procédé de fabrication
JP2015003602A (ja) * 2013-06-20 2015-01-08 日本板硝子株式会社 自動車用ウインドウガラス及びその製造方法

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JPS54158741A (en) * 1978-04-28 1979-12-14 Ford Motor Co Electric heating plate
JPH01503050A (ja) * 1987-02-17 1989-10-19 リビー‐オーウェンズ‐フォード・カンパニー 電熱窓アセンブリ製造方法と窓アセンブリ
JPH0487182A (ja) * 1990-07-26 1992-03-19 Asahi Glass Co Ltd 電熱風防合せガラス
WO1992019135A1 (fr) * 1991-05-08 1992-11-12 Giocondo De Riz Miroir empechant la condensation et utilise dans des environnements tres humides en particulier des salles de bains
WO1994005524A1 (fr) * 1992-09-03 1994-03-17 Ristance Corporation Vitre antigivre et antibrouillard, et procede pour sa fabrication
JPH101027A (ja) * 1996-06-12 1998-01-06 Central Glass Co Ltd 車両用の前部窓ガラス
JP2000235889A (ja) * 1998-11-10 2000-08-29 Asahi Glass Co Ltd 防曇ガラス
JP2002002452A (ja) * 2000-06-19 2002-01-09 Central Glass Co Ltd 防曇ガラスの加熱構造
WO2005105691A1 (fr) * 2004-04-28 2005-11-10 Asahi Glass Company, Limited Vitrage avec impression conductrice et procédé de fabrication
JP2015003602A (ja) * 2013-06-20 2015-01-08 日本板硝子株式会社 自動車用ウインドウガラス及びその製造方法

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Publication number Priority date Publication date Assignee Title
US10723318B2 (en) 2016-12-20 2020-07-28 AGC Inc. Window glass for a vehicle

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